ds is 3.6 and is what kind people would call 'young for his age'. Because I put my sanity high up the list he has been in a nursery 2-3 days a week since he was 8 months old. He has only seemed to like it in the past 4 weeks or so (waits to be crapped on by anyone feeling good and judgey). Not helping you, just saying I might have felt some of the same, some of the time. It is shit sometimes. I have cried at parents' evenings and agonised over how to do the 'right thing' (hint: there isn't a right thing. I am a SAHM 2 days a week and it's enough to tell me he would be worse off being looked after me full-time).
Sorry can't help more than offering to share the experience of feeling bad sometimes. Do you have a TV? The Apprentice will be on at 9om and you can watch it smugly, knowing that you will never be like any of them.